pi() => "π"
square() => "■" // maybe? bool filled = false to make empty box?
arrow_up() => "▲"
arrow_down() => "▼"
warning() => "⚠"
checkmark() => "✅"
no_entry() => "🚫" // ∅
excited() => "🤩"
worried() => "😧"
bear() => "🐻"
bull() => "🐮"
goldencross() => "♰"
deathcross() => "☠"